I'm making a wax melter a-la http://www.candletech.com/general-in...lf-wax-melter/ presto pot. I went to get a thread tap and all Home Despot had is a "16NC" tap set in 3/8". Will this tap threads for regular NPT fittings like a regular brass plumbing fitting?

Do the compressed-air fittings (there's a nice 3/8" full-port valve with male threads, where most fo the other ball valves have female on both ends) have the same thread count as NPT or this die, or do I need to use plumbing fittings only?